In 1922, a farmer in rural Bavaria, Germany discovered something that should have made him run. Footprints in the snow — leading from the forest straight to his front door. None leading back out. Andreas Gruber told his neighbors. They thought he was paranoid. He also heard footsteps in the attic. For days. The maid who worked there had quit without explanation. She just said the farm felt… wrong. A few weeks later, all six people on the Hinterkaifeck farm were found dead — murdered with a single farm tool. The killer was never found. But neighbors reported smoke rising from the chimney after the murders. For days. Someone had been living in that house — with six dead bodies.